Countertop extension device



FIG. 1 is a front top right isometric view of a countertop extension device showing my new design;

FIG. 2 is a front top left isometric view thereof;

FIG. 3 is a front bottom left isometric view thereof;

FIG. 4 is a front bottom right isometric view thereof;

FIG. 5 is a front view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a left view thereof;

FIG. 8 is a right view thereof;

FIG. 9 is a bottom view thereof;

FIG. 10 is a rear view thereof;

FIG. 11 is a rear top right isometric view thereof;

FIG. 12 is a rear top left isometric view thereof;

FIG. 13 is a rear bottom left isometric view thereof; and,

FIG. 14 is a rear bottom right isometric view thereof. 

CLAIM I claim the ornamental design for a countertop extension device, as shown and described. 